Research has shown that simply using lethal methods of pigeon control (culling) is not effective in the long term. Destruction of nesting sites and installing proofing / deterrents are generally considered the best options. Products such as netting (bird net, wire or mesh) are used to exclude pigeons from an area. Pigeon spikes, wire coils, post and wire and electric systems can be used to prevent pigeons from landing or roosting on building ledges and surfaces. Other methods include; scare devices such as a combination of audio or visual deterrents, or the application of gel products that pigeons find sticky and uncomfortable to stand on. It will also be in the best interest for neighbouring properties to proof their property otherwise pigeons will quickly take up residence and simply move the problem around without reducing the flock size. What birds are using a particular part of a building for will determine how motivated they will be to try and regain that area after proofing, and therefore what proofing systems can be used. The level of pressure needs to be determined before a deterrent or proofing method is selected: Light Pressure – using an area as an occasional look out spot, Medium Pressure - day perch locations, Heavy Pressure - nest sites and night perch areas.